In such a united kingdom, not only are polymer banknotes more secure, but on average, they last two and 1/2 times longer within expected life span of seven years. 00:01:57.950 --> 00:02:1.670 This obviously reduces production costs on at the end of their life. 00:02:1.680 --> 00:02:3.150 There ought to be recycled. 00:02:4.180 --> 00:02:7.290 What's more, a lot of paper banknotes aren't actually paper. 00:02:7.300 --> 00:02:23.880 Three U S dollar, for instance, is 75% cotton, which requires large quantities of water and pesticides to produce every stage of the polymer life cycle, is more environmentally friendly, so they're cheaper, greener, more durable, on harder to counterfeit.